pelletreau



UNITED STATES PATENT QFFICE.

M.. x. PELLETREAU, 0F New YORK, N. Y.

BOOKBINDERS STANDING PRESS.

Specification of Letters Patent No. 30,243, dated October 2, 1860.

To all. 'whom it may concern:

Be it known that I, M. K. PELLETREAU, of the city, county, and State ofNew York, have invented a new and useful Improve-4 ment in Bookbinders7Standing Presses; and I do hereby declare that the following is a full,clear, and exact description of the same, reference being had to theaccompanying drawings, forming part of this specification, in which-Figure l, is a side elevation. Fig. 2 an end elevation. Fig. 3 a plansection.

Similar letters of reference indicate corresponding parts inthe severalfigures.

The general form of this press is similar to those in common use. Theframe consists of solid top and bottom pieces of oblong form A, A',separated by rods A2, at each corner made in the usual manner. Passingthrough the center of the top piece A, is a strong screw H, by which thecompression is obtained, the interior of the top piece A, being providedwith a nut which fits the screw H. The lower part of the screw H, isconnected by a loose joint with the upper follower I, which is made torise and fall between the rods A2, by means of its connection with thescrew H, the connection being such that as the screw rotates and thusrises or falls the follower I, will be correspondingly elevated ordepressed. Rotation is given to the screw I, by means of a lever J, theinner end of which is made to encircle the lower part of the screw I,which latter is provided with a double ratchet, and within the extremityof the lever J, there is a spring pawl which engages the ratchet so thatby shifting the pawl and applying power to the lever J the screw I, maybe rotated in either direction as may be desired.

The foregoing parts are all constructed and arranged in the usual mannerso that no further description of them is necessary.

My improvement relates to a means of elevating and depressing the bottomfollower A3, which like the upper follower I, is arranged to rise andfall between the rods A2, and is guided and supported in its verticalmovement by the cogged side bars G. These are strong bars extending fromthe top piece A, to the base A', and provided on one of their sides witha cogged rack F. The ends of the followers I, A3, are provided withprojections c which fit into corresponding grooves in the bars Gr, whichgrooves ex tend the whole length of said bars. The projections serve toguide the ascent and descent of the followers see Fig. 3.

Upon the under side of the follower A3 there is arranged longitudinallya rotating shaft D, which is supported in a frame or, that is cast uponthe follower A3 and projects down from the bottom thereof. The shaft D,has its bearings in this frame a. Each extremity of the shaft D, isprovided with a pinion E, which engage with the racks F, upon the barsG. j In the center of shaft D, there is a worm wheel or pin* ion L, withwhich a screw C, engages said screw being cut upon the extremity of ashaft M, which is arranged at right angles to the shaft D. Shaft M,extends from the side of follower A3 through an aperture therein toshaft D, as shown, the bearings of shaft M, being in the follower A3 andin the box a. The outer extremity of shaft M, is provided with a crankB, by which rotary motion is given to the shaft M, which imparts asimilar movement to shaft D, causing the pinions E, to travel up or downupon the racks F, according to the motion given to shaft D, and thus toelevate and depress the follower A3 at the will of the operator.

In bookbinding presses as commonly made it is necessary in order tobring the load of paper to be pressed up to or nearly up to the screw ofthe upper follower I, to place a stack of boards upon the base or bottomwhich boards serve as a filling, for it is found disadvantageous to usea very long compressing screw owing to its liability to spring or breakwhen its length exceeds a certain measure unless it is made excessively'heavy and expensive. The use of the boards as a filling is attendedwith much labor inconvenience and loss of time in their adjustment andthey likewise by their elasticity prevent the rigid compression of thesheets which is so necessary in order to remove the indentations of thetypes upon printed sheets.

By the use of my improvement all filling boards are dispensed with and Iam enabled to adjust the load to be pressed to the upper follower in themost expeditious manner.

The following is the operation of my improvement. The load of sheets isplaced upon the lower bed or follower and the crank B, is then turned soas to convey up the load against the bottom of follower A3.

The screw I, `is now rotated so as to cornpress the sheets and afterremaining thus compressed for a suitable time 'additional compressingforce is applied to lever J. When the pressure has been continuedsufficiently long the crank B, is rotated so as to lower the load andthe sheets are removed.

My improvement thus greatly facilitates the operation of pressing thesheets and also enables the work to be done in a better manner, becausethe sheets are pressed between two rigid surfaces, and the base uponwhich they rest is not elastic as it is when filling boards are used.

rIhe expense of my attachment is not greater than the cost of thefilling boards, so that by my improvement I am enabled to produce a muchsuperior working press without any augmentation of expense.

The side bars G, also serve to guide and steady the followers and alsogive much additional strength and firmness to the press.

.I do not claim broadly the invention of presses having two followers,but

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

The arrangement of the guide rack bars G, pinions E, E, shaft D, wormwheel L, screw C, and shaft M, with the followers A3, I, and top andbottom plates A, A, as herein shown and described whereby the press isstrengthened the followers guided, and the lower follower quicklyadjusted all as set forth.

MALTBY K. PELLETREAU.

Viitnesses WM. TUsoH, M. vM. LIVINGSTON.

